Definition of just-so story in US English:

just-so story

noun

  • 1A story which purports to explain the origin or relate the early history of something; a myth.

  • 2Science. An unfalsifiable and unprovable explanation for a phenomenon; especially one purporting to show why a particular trait or behaviour has been favoured by natural selection.

Origin

Late 19th century. From just so + story.

Pronunciation

just-so story

/ˌdʒʌst ˈsəʊ ˌstɔːri/